LaTeX-Box-Team/LaTeX-Box — pull request #194 by cwahbong (2014-06-29 14:25:37+00:00)
Title: Fix folding preamble area.

If there are \documentclass and \begin{document} in comments then there
are multiple folded preamble.

The fix correct the match pattern by prefix with s:noncomment and
s:bslash.